I changed mine to the Philips Blue Vision yesterday and I have to say, I'm very happy with them. Vision is improved and they have a far more pleasing colour to them. I was a little concerned because the sidelight bulb is full blue, but that doesn't translate when the lights are on, it's just a nice white light.
And changing them was very easy I thought. You just need some long nose pliers to help get to the sidelights.